- Have at least two or more of the following risk factors for drug-induced nephrotoxicity: a) receipt high-dose vancomycin therapy (greater than or equal to four grams per day) b) receipt of vasopressors c) receipt of nephrotoxic drugs (i.e. aminoglycosides, furosemide, acyclovir, amphotericin b, colistin, and intravenous contrast dye) d) pre-existing renal dysfunction (i.e. SCr greater than or equal to 1.5 mg/dL).